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Java > Open Source Codes > java > awt > event > HierarchyBoundsAdapter


1 /*
2  * @(#)HierarchyBoundsAdapter.java 1.7 03/12/19
3  *
4  * Copyright 2004 Sun Microsystems, Inc. All rights reserved.
5  * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
6  */
7
8 package java.awt.event;
9
10 /**
11  * An abstract adapter class for receiving ancestor moved and resized events.
12  * The methods in this class are empty. This class exists as a
13  * convenience for creating listener objects.
14  * <p>
15  * Extend this class and override the method for the event of interest. (If
16  * you implement the <code>HierarchyBoundsListener</code> interface, you have
17  * to define both methods in it. This abstract class defines null methods for
18  * them both, so you only have to define the method for the event you care
19  * about.)
20  * <p>
21  * Create a listener object using your class and then register it with a
22  * Component using the Component's <code>addHierarchyBoundsListener</code>
23  * method. When the hierarchy to which the Component belongs changes by
24  * resize or movement of an ancestor, the relevant method in the listener
25  * object is invoked, and the <code>HierarchyEvent</code> is passed to it.
26  *
27  * @author David Mendenhall
28  * @version 1.7, 12/19/03
29  * @see HierarchyBoundsListener
30  * @see HierarchyEvent
31  * @since 1.3
32  */
33 public abstract class HierarchyBoundsAdapter implements HierarchyBoundsListener JavaDoc
34 {
35     /**
36      * Called when an ancestor of the source is moved.
37      */
38     public void ancestorMoved(HierarchyEvent JavaDoc e) {}
39
40     /**
41      * Called when an ancestor of the source is resized.
42      */
43     public void ancestorResized(HierarchyEvent JavaDoc e) {}
44 }
45
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